Relay and circuits therefor



July 21, 1925.

D. E. BRANSON RELAY AND CIRCUITS THEREFOR Filed June 21. 4

IN VEN TOR B E fll ZZIZJOII/ ATTORNEY Patented July 21, 1925.

UNITED s'ra'ras 1,546,432 PATENT OFFICE.

DAVID E. BRAITSON, 01 BLOOMFIELD, NEW JERSEY, ASSIGNOR TO AMERICAN TELE-IHDNE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.

RELAY AND CIRCUITS THEREFOR.

Application filed June 21, 192-1. Serial No. 721,487.

To all whom it may concern:

Be it known that I, Davin E. BRANSON, residing at Bloomfield, in thecounty of Essex and, State of New Jersey, have invented certainImprovements in Relays and Circuits Therefor, of which the following isas ecification.

.his invention relates to relays of the vibrating armature type, andmore particularly to accelerating arrangements therefor. An object ofthe invention is to provide a circuit arrangement for polar relays whenonly a single local battery is available.

Another object of the invention consists in the use of such arrangementin connection with local and other circuits to provide for the openingand closing thereof or to provide continuous interruptions therein.

These objects and further objects of the invention will be apparent fromthe following description, when considered in connection with theaccompanying drawing, in

' which a preferred embodiment thereof is diagrammatically represented.

Referring to the drawing, the numeral 4 designates the yoke of a polarrelay which has associated withit a permanent magnet 5. The armature-ofthe relay, in this instance, is shown, as bein provided with apluralityof'windingsi' 1e operating windmg 6 for the relay is connectedto conductors 7 and 8, extending to an operating circuit in which isincluded a source of current that may flowthrough the windingti ineither direction. The opposing windings 9 and 10 are-bridged across thecontacts of the relay,

and are grounded at their center point 1n I such a w y that steadycurrent flowing.

through these windings, as will presently appear, tends to move thearmature 11 away from either the contact 121 the contact 13, againstwhich itmay be resting, to the o The armature 11 may e posite contact.

' clamped at one end, and its opposite end may extend through the airgap provided between the pole pieces of the yoke 4. In this position theextended end of the armature may swing between the contacts 12 and 13.The accelerating winding 14, which is in series with the condenser 15,is also connected to the contacts 12 and 13, in such a way that a surgeof current, upon the closing of a contact or at the time the armature 11is in the air between the contacts, will supplement the influence of theoperating correspondin the direction in which it is being vibrated.

In the present arran ement the o osin windings 9 and 10 sh pp g means ofresistances 16 and 17, respectively so that their effect will not takecontrol of the operation of the relay, but will serve to neutralize theeffect of the accelerating winding 14.

' A condenser 18, in series with a resistance 19, is associated witheach of the contacts 12 and 13 of the armature 11 toprotect saidcontacts from arcing, and also serve to prevent interference between thelocal relay circuits, in which rela 20 and [retardation coil 21 arerespective yincluded, and the vibrating circuit.

The local circuit including retardation coil 21 is provided in case itis desiredto eliminate relay bias. This circuit is similar to the localcircuit in which relay 20 is included, and is connected to ound from thecontact 13 so that the-local clrcuits extending from each of thecontacts of armature-11 to ground' will be entirely symmetrical.

Ifit is permissible to operate thepolar relay with a'slight bias for thearmature 11, this may be brought; about by connecting only one contact othe armature to ground through the 'moderate resistance presented by-therelay 20, included in the local circuit connected to that contact, sothat the oppoould be adjusted bysite contact .of the armature will haveno local circuit and retardation coll connecte thereto.

Incoming current from the operating circuit over the conductors 7 and 8fiows' of the armature on either contact 12 or 13 will cause a surge ofcurrent from the local battery over the contact against. which thearmature may be positioned, and will hold the armature momentarilyagainst the make contact by means of accelerating winding 14. With thearmature 11 of the polar relay positioned a ainst the contact 12, asindicated in the rawing, a circuit is closed from local batteryconnected-to the armature, through said contact, resistance 16, opposingwinding 9 to ground. In case the armature 11 is positioned againstcontact 13, a circuit will be closed from battery, through make contact13, resistance 17, opposin winding 10, to ground. The closure of eitherof these circuits tends to neutralize the effect of the acceleratingwinding 14 and to move the armature from the contact at which it is sitecontact.

The circuit comprising the opposing windings 9, '10, and 14, includingthe reresistance 16 and 17," is so arranged that the relay may be madeto operate in accordance with current incoming over the conductors 7 and8 and flowing through the op crating winding 6.

The winding 6 may be omitted, if neces-f sary, and in such case therelay will be operated by the opposing Windin'gs'Q, 10 and theaccelerating winding 14, and will function similarly to that previouslyoutlined.

Each time the armature 11 in Vibrating rests against contact 12,acircuit is momentarily established from the-local battery,

through said armature and contact 12, wind ing of relay 20 to ground.The closure of this circuit causes the operation of relay 20, which inturn completes a circuit over'its make contact to operate such circuitsand apparatus as it may be desired to control.

While the arrangements of this invention have been illustrated asembodied in a certain specific form which has been deemed desirable, itwill be understood that they are capable of embodimentin many and widely,varied forms without departing from the rious testing and measuringcircuits.

What is claimed is: I 1. A vibrating relay system including a polarrelay having anarmature, a pair of contacts between which said armatureis adapted to swing, an operating winding associated with said armatureto bias it toward either of said contacts, a winding associated withsaid armature and bridged across said contacts'to supplement theinfluence of said operating w1nding,a source of current connected'withsaid armature, and an opposing winding connected with each contact forcompleting a circuit from said source of current to neutralize theeffect of the bridged winding on said arma positioned toward the oppo-'contacts between which said armature is.

adapted to swing, an operatingwinding associated with said armature tobias it to,

- ture, and a pair of windings associated with the'armature and brid edacross said con-' tacts, eachof said win ings being adapted ,to'completea circuit trom said source of currentthrou h the contact with which itis connected and 'said armature to neutralize the'efiectof the bridgedwindingon the armature. v

3. A vibratingsystem including a polar relay-having an armature, a pairof contacts ,between which said armature is adapted to swing, anoperating winding associated with said armature to bias it toward eitherof said contacts, an accelerating winding I bridged across said contactsto supplement the influence ofsaid operating winding, a

single source of current connected with said armature, and an opposing'wmdmg connected with each contact member for completing a circuit fromsaid source of current to neutralize the efl'ect ofthe operating andaccelerating windigi tacts, and a local circuit controlled by, saidarmature through one of its'contacts.

4. .A v brating relay system including a polar relay having an armature,a pair of contacts between which said armature is adapted toswing, anoperating winding associated'with said armature to bias it toward eitherof said contacts, 'a' winding bridged across said contacts to supl ementwith which it is connected to neutralize the efiect of the bridgedwinding, and a resistance associated with each ,of the opposing windin swhereby proper relation is obtained etween the eiiects of the opposing;-

windings and the bridged winding.

a .on said armature; when 1t 1s positione at e ther of SaId'COIk- 5. A.vibrating system including a polar relay having an armature, a pair ofcontacts between which said armature is adapted to swing, anoperatingwinding associated with said armature to bias it toward either of saidcontacts, an accelerating Winding bridged across said contacts tosupplement the influence of said operating winding, a single source ofcurrent connected with said armature, and an opposing winding connectedwith each contact member for completing a circuit from said source ofcurrent to neutralize theelf ect of the operating and acceleratingwindings on said armature, when It is positionedat one contact and tendtomovethe arnia'ture to the opposite contact when theoperatmg windingassociated with said armature to.

bias it toward either of said contacts, a winding bridged across saidcontacts and connected therethrough with said source of current, saidbridged winding being adapt- I ed'to supplement the influence of saidop- I crating winding, and a pair of windings associated with thearmature and budget], across said contacts each of said windings beingadapted to complete a circuit from said source of current through thecontact with which it is connected to neutralize the eifect of thebridged winding and operating windin a condenser connected with saidbridge winding for efl'ecting therethrough, a change in current duringthe movement of said armature, said change in current taking place inadvance of current changes through said opposing windings to acceleratethe movement of said armature, and a resistance associated with each ofthe opposing windings whereby proper relation is obtained between theefi'ects of the opposing windings and the bridged winding.

In testimony whereof, I have signed my name to this specification this20th day of June 1924.

DAVID E. BRANSON.

